[HSO]

Sure but then it also pays to be clear what you are doing: It it not about "truth" or epistemology but about influence/propaganda/persuasion/pick your own euphemism.

And the literature on this is completely difft and, more to the point, vastly more effective than the one on philosophy of science or striving for truth.

Not saying one is better than the other. My point is only those are difft and Sagan is not a good guide to make masses of people vote or act how you want.